Unsatisfied with the Tx power of my Linksys EA8300, I decided, without knowing what I was doing, to put OpenWRT on it (Because haha it'll be easy). Obviously I did something wrong along the way (got the OpenWRT firmware for EA8300 and loaded it as a firmware update) and it's now dead in the water. The lights light up, and ethernet still works on the ports, but there's no wireless signal, no SSID showing up, and the 192.168.1.1 page is inaccessible through ethernet. Insert Da Squad yell here. I've tried googling around but no luck for this model. I've tried the 30/30/30 reset but nothin. Is there anything I can do? I need help plz. Thanks.
To be clear, I don't think your router is bricked. I think it successfully flashed; and by default, you have no wireless and no GUI - that is expected. You'll need to learn to SSH to the command line to solve any of your current issues.
If you cannot SSH, then you'll have to use TFTP recovery (per the wiki page). That would require you to open the device and have a special 3.3 Volt TTL serial cable; and maybe even soldiering.
It’s a dual-firmware device. Just power it off three times in a row after it starts booting (~10 seconds after the lights first flash) and it will switch back to the “other” firmware. If you only flashed once, that will be OEM.
As I own three, I can tell you the wireless performance is comparable, but OpenWrt is more secure, more flexible, and doesn’t “phone home” like the Linksys firmware does.